Accurate job descriptions provide a basis for job evaluation, wage and salary comparisons, and an equitable wage and salary structure. They provide information about the knowledge, training, education, and skills needed for each job. Well-crafted job descriptions prevent unnecessary misunderstandings by telling employees what they need to know about their jobs. They also provide a basis from which to determine whether a disabled applicant is otherwise qualified for the job and, if so, to assist in determining what accommodation would be required for the applicant to be able to perform the essential functions of the position.